Aryloxide ions (Ar'O-) behave as C-nucleophiles towards diazosulfides (ArN=NSR; R = Ph, But) leading to unsymmetrical hydroxybiaryls (ArAr'OH) via C-C coupling. The reaction is particularly suited for the synthesis of terms which contain electron-withdrawing groups on the Ar moiety. The SRN1 mechanism is proposed on the grounds of experimental evidences.
BEUGELMANS, RENE;BOIS-CHOUSSY, MICHELE, TETRAHEDRON LETT., 29,(1988) N 11, 1289-1292
作者:BEUGELMANS, RENE、BOIS-CHOUSSY, MICHELE
DOI:——
日期:——
Phenoxide and naphthoxide ions as nucleophiles for SRN1 reactions: Synthesis of biphenyl and phenylnaphthyl derivatives
作者:René Beugelmans、Michèle Bois-Choussy
DOI:10.1016/s0040-4039(00)80279-8
日期:1988.1
Biphenyl or phenylnaphthyl derivatives are obtained by photostimulated SRN1reactions between the anion of phenols or naphthols and variously substituted haloarenes.
Synthesis of Phenol–Pyridinium Salts Enabled by Tandem Electron Donor–Acceptor Complexation and Iridium Photocatalysis
作者:Matthew C. Carson、Cindy R. Liu、Marisa C. Kozlowski
DOI:10.1021/acs.joc.3c02872
日期:2024.3.1
the C–N cross-coupling of unprotected phenols and pyridines proceeds in the presence of oxygen to furnish pyridinium salts. Photocatalytic generation of phenoxyl radical cations also enabled a nucleophilicaromaticsubstitution (SNAr) of a fluorophenol with an electron-poor pyridine. Spectroscopic experiments were conducted to probe the mechanism and reaction selectivity. The unique reactivity of these
在这里,我们描述了一种使用可见光合成苯酚吡啶鎓盐的双光催化系统。利用电子供体-受体 (EDA) 络合物和铱 (III) 光催化循环,未受保护的酚类和吡啶在氧气存在下发生 C-N 交叉偶联,生成吡啶鎓盐。光催化产生苯氧基自由基阳离子也使得氟苯酚与缺电子吡啶发生亲核芳香取代(S N Ar)。进行光谱实验来探讨其机理和反应选择性。这些苯酚-吡啶鎓盐的独特反应性在几个衍生化反应中表现出来,提供了快速进入不同化学空间的途径。